Vietnamese people …………………… their ancestors

5. Vietnamese people …………………… their ancestors.

A. commemorate   B. offer incense     C. worship                      D. preserve

6. When my father arrived home, we ……………… plants in the garden.

A. watered            B. were watering            C. watering           D. was watering

 7.  You …………………. tip in Vietnam.

A. don’t have to    B. have to             C. must                          D. mustn’t

8. We …………….our promise to the children.

A. shouldn’t break B. should follow   C. don’t have to follow     D. Both A & B are accepted